Process of making stencils.



J. G. UDALL. 4

PROCESS 0I' MAKING STENCILS.

APPLIOATIQN FILED Dnc. 26,1908;

929,730. Patented Aug. 3, 1909.

Attest: im ab@ M Q1/dfi Inventor:

`TOHN CLARK UDALL, OF. SOUND anion, CONNECTICUT.

nnocnss or' MAKING sTnNcILs,

Specification of Letters Patent. i

Patented Aug. 3, 1909.

Application med December 26, 1908. Serial No. 469,251.

To all whom 'it may concern: i

Be it known that I, JOHN CLARK UDALL, a citizen of the United States, and a resident of Sound Beachfn the county of Ez'iirieldl and State of Connecticut, have invented'cer tain new and useful Improvements in the Process of Making Stencils, of which the following is a specification.

My invention relates to the process of making stencils for applying artistic impressions or pictures to the surfaces of wood, metal, fabrics, etc., the stencil being capable of being made in the likeness of natural objects.

Thel object of the invention, among other things, is to so construct or fabricate the stencil that correlated dots or Ispots on the netting, as well as the narrow lines, and the margins of the solid portions, will not only prevent the paint or other coloring material from being spread upon the surface receiving the impression, but will revent the coloring matter from spreading eneath or back of the said' dots or spots, or beneath or back of the narrow lines on the stencil or back of the edges of the margins outlining the subject of the stencil. l

In the accom anying drawings to which reference is ma e, and which form a part of this specification,-Figure l is a plan. View of a portion of a stencil, made in accordance with my invention. Fig. 2 is a sectional elevation of a'plate, having the netting applied thereto. Fig. 3 is a back view of the plate and netting. Fig. 4 shows a modification of the plate- In the accompanying drawings, 2 desig-- nates the body of the stencil, composed of netting of a suitable mesh, preferably French lawn or organdy.

In making the stencil the bod 2 of netting is applied tothe surface o a late 3, preferably a zinc late, perfectly at and polished on the sur ace' to which the net-ting is applied. The netting is folded over the edges of the plate and held fast, preferably by sticking it to the b`ack of the plate, as

shown at 4, by means of paste or other ad-I hesive material. The netting is drawn snug and fla-t on the plate, and drawn in two directions, at right angles, so that the strands are drawn taut and are held in that condition, in close contact with the plate. Thus secured to the plate, the netting and the plate itself are` coated withsensitized glue,

sensitized gelatin, or other sensitized'adhe sive material, which, when exposed to light, will take a photographic print.

I prefer to apply three coats of the sensitized material to the netting, and to the surface of the plate, and to bake each coating before the other is applied, care being taken not to expose the plate to the action of light,

at least after the first coat has been put on and baked. The netting and plate now befingproperly coated and dried, I take a transparency, preferably a glass photo graphic negative, on which has been taken, through a screen, or a plate of lined glass, the picture of the person, object or thing desired to be the subjectto be reproduced by the use of the stencil, and apply thereto the coated netting and plate in a printing frame,

kand print the sensitized netting and plate by exposure to sunlight or the action of the actinic rays of artificial. light in the manner well known as sun print1ng in the art of photography. do not limit myself to the use of a photographic transparency, but if such a half-tone photographic negative be used, I refer to place it in the printing frame wlth the film side up, so that the film will make a perfect contact with the sensitized material on the netting and plate. In printing, those portions of the sensitized material on the netting and plate, 'which are acted u on by the light., are rendered insoluble in water, while those portions .not exposed to the light remain soluble in water, and both of said portions after exposure still remain at all parts closely adherent to the dat and polished surface of the plate, and a sharp demarcation between the insoluble and the soluble portions of the sensitized material is produced by the action of the rays of light. After exposure to the light, the plate 3, the netting and `the coating of sensitized material are immediately washed in water, preferably by a stream of water directed upon the same. This wash-` ing dissolves and vcarries away the soluble portions ofthe sensitized material from the netting and from the plate, leaving the strands of the netting clean and exposed,

but still taut, and leaves the insoluble portions still in contact with and adhering to are swollen and rendered soft and quite easily disturbed at their outer surfaces'only,

practically no dissolving taking place next 4lit, 'the flat surface of the plate. The insoluble4 portions, While not dissolving in the water,

iov

to the plate:beneaththefinsolgble sensitized material. "`llift`er""washing`, asV Justde'sc'riljed,

- the late, with its netting and the -atta :hed

inso uble portions still sticking' fast thto,

-is dried, preferably by lbakingthe s aniein an oven. This drying eva'porates" the .mois- 'nire ,fremtheaseliible Portias /Qf ..the sensit'ized material, andshrinks and hardens each`l portion'ot the samewhiley'et held bythe strands of'thenetting, and in turn the in-- .soluble portion holds thefstrands of thonet;

ting Hat doainuponj the surface of the plate. At somegportions. o -the ,stencil the sensitized'llalalsticks fast tothe plate, as for netting. yWhendry,l the stencil is vremoved 20.

from the plate and it isthen ready or use. In use the stencil-is'placed'flat` u on the ,surface which isto receive, -the imprint, and

I useoidinary house-paint as the coloring material which lcan be perfectly applied 4with a brush .or scraper, since the contact is so perfect that While'the paint will pass bei I v lneath the strands'of thenetting, it will not Y pass beneath Vthe dots or spots, narrow ortions or4 themtirgins of the stencil, to lur or cisfigurethet perfection of the impression ina e...

I `4In order to'ifacilitate the removal of the. netting-.and sensitizedniaterial from the plate, prefer some cases to coat it with' a substance towhich glue will not adhere as tenaciously as it does to the plate itself, and 4forthisg purpose I prefer to employv athin Alayer-,791iori-gall, and. I prefer this because- 4it dries/guickly and whenA dr vhand an dY makes a very smooth surface an is transparent and not affected by heat..;

I do not limit myselfv to the use of a metal4 'i plate, ,asa- :plate of glass vor other material mightbensed, but'I refer a polished metal plate', asit will ,no tj reak or warp, audits .polished surface has a reflective influence during the yexposure forprinting which tendstogsharpen the' lines of demarcation between those parts of thesensitized material which are rendered insoluble andthose which rremain soluble. l

Having thus described my invention, what. I claim as new and desire` to secure by Letters Patent is,-

herein described of making p foraminous stencils, which consists in applying netting to the surfaceof a late, coatlstencils, which consists in applying a coat- 1, The process ing the netting and plate with a hesive en sitizedfmaterial, photo printing the 'ilject for thestencil on said coatin by exposure of the same tothe action of light while ad- ,.hering to the said netting and plate, then Washing said coating, netting andl plate, to remove the soluble ortions of the coating,

=leaving,thev insolub e portions adhering to` ing said vnettin chanac aid plastici; dama-eingang 'and the 'in'soluble portions of the coatino while still adhering to the plate, and finally removing the stencilfrom the plate, substantially as described. l

2. The process hereiii'described of making 'foraininous stencils, which consistsin a plyingfnetting to the surface of a plate, raw

ing the'iietting taut 'ln contact with the plate,

coating the nettin and plate with adhesive sensitized material, photo-printing tlie subject for v,the stencil 'on said coating and netting by ex iosure of the saine to the action of ,iight `wml remove the soluble 'portion adhering to the" plate, their-drying the netting andthe insoluble portions of the 'coatin ,while still adhering tothe'plate, and fina 1yV removing the stencil frointhe plate, substantially as described.

. 8. The process ing netting to the surface o f a plate, rawing the strands-of the netting taut in contact with-thesurf'ace vof the plate, coating the netting and the plate with adhesive sensitized material, drying the saidvcoating,` photo-printing the subject for the stencil ony said coating and netting by exposing thesam to the action of 1i ht while adhering (to said plate, then was ing said coating,

netting and plate to remove the soluble portions adhering to the late, then dryi the netting and' the inso uble-portions o the coating while still'adherin'gto the plate, and

vfinally removing the stencil from Ithe plate,

substantially as described.

4. The vprocess' of making foramino'us stencils, which. consists in applying a coat--l 4ingof material to a plate .to which coating glue will notadherefso tenaciously as to meta1,;applying netting to said plate and drawing vthe same taut, and sec uring;..the edges to said plate, coating said nettingaud plate with i adhesive s sensitized material, photo-printing the subject for the stencil o n said sensitized coating Vand AnettingA byvexposino' the same to the action of li t, while adhering to said plate, then -was ingsaid-I coating, netting and plate-,to remove 4the soluble portions adhering tothe plate, then drying the netting and theinsoluble 'por- .tions of the coatinflr whilestill adhering Ily yremoving the stencil.

the plate, and fina from the plate, substantially as described. 5

5.,.The process 'of making foraminous ing of `oir-gall to the surface of a plate, applying netting `to said plate anddra'wing the same taut in contact with the plate, coatand plate wit eV adhering Ato said plate, then Washingsa'id coating, nettingand plate to.'`

.herein described of making i foraminous stencils, which consists in a ply-.-

y adhesive sensitized'material, printing thesubject for the stencil on said sensitizedcoating by yc xposingthesame to the action 'ot light while drying adhering to said plate, then washing said coating, netting and plate to remove the soluble ortions adhering to the plate; then tihe netting and the insoluble portions of the coat-ing While still adhering to the plate, and finally removing the stencil from the plate, substantially as described.

6. The process herem described of making foraminous stencils, which consists in ap lying netting to the surface of a fiat ate, having a polished surface, drawing sai netting'taut in contact ywith saidv ollshed sur face, coating said netting an plate with sensitized adhesive' material, drying the same, then printing the subject for the stencil on said sensitized material by exposure` to the action of'light, then Washing the sensitized 'coating, netting and plate to remove the soluble portions of the sensitized material, then drying the netting and the insoluble portion of the sensitized material While still adhering to the plate, and finally removing the stencil from the plate, substaniially as described.

f7. In the process of making foraminous stencils, therocess of rendering soluble by exposure to ight certain portions of sensit-ized adhesive material, While the same is held on netting applied to a plate, then removing such soluble portions by Washing the sensitized material, and netting, While still adhering to the plate, for removing from the netting and plate the said soluble portions, leavingthe insoluble ortions of the sensitized material still a hering to the plate, substantially as described.

8. The process herein described of making foraminous stencils, which consists of sticking nettin to the surface of a plate by liquid sensitized adhesive material, drying the same on said plate, printing the subject for the stencil on said sensitized material, by exposing the same to the light, then Washing the .netting and plate to remove therefrom the soluble portions of the sensitized material, then drying the nettin and the insoluble portions of the sensitize material on said plate, and removin the stencil from the plate, substantially as escribed.

9. The process of makingua forarninous stencil, which consists in applying netting taut upon a plate, coating the netting and plate with a liquid sensitized adhesive material, drying the same, exposing the same to the action of light through a pictorial subject for the stencil Whose high lights are made up of isolated and regularly disposed dots or spots, Washing the coating, netting and plate to remove the soluble portions of the coating, leaving the isolated dots or s ots held by the nett-ing fiat upon the plate, ryin the netting and insoluble portions while adering to the plate and finally removing the stencil from the plate, substantially as described.

Signed at city of New York, in the county i of New York and State of New York, this 21st day of December, A. D. 1908.

JOHN CLARK UDALL. Witnesses:

RoswELL M. PATTERSON, FRED. H. Pe'r'riansorn 

